L
L
OOPS
OOPS
& L
& L
OOP
OOP
D
D
ETECTORS
ETECTORS
B
ASIC
L
OOP
L
AYOUT
:
The following diagram shows a typical swing gate application for two-way traffic or exit traffic. For one-way entry traffic, the
open loop is not needed. (This diagram is a basic loop layout and does not show safety devices, pedestrian gate, fencing, etc.
Refer to “
I
MPORTANT
S
AFETY
I
NFORMATION
” for gate details.)
L
OOP
I
NSTALLATION
G
UIDELINES
:
Proper loop installation is a critical aspect of any gate application. An improperly installed loop may operate intermittently
causing false triggers, holding the gate open, or allowing the gate to close on traffic. The following guidelines should be
followed when installing loops:
1. Determine proper location and size of each loop. Chalk out
loops on the driveway:
Loops should be 4 - 5 feet back from the gate path. Loops any
closer may be cause false activation when the gate passes by.
Determine the size of the loop. Make the loop large enough so
a vehicle must pass over the loop. The average loop is 4’ x 8’.
Consider the detection height.
Determine the detection height. The typical sensing height is
2/3 of the shortest leg. (Example: a 4’ x 8’ loop typically has a
detection height of 2 1/2 feet.) To increase the detection height,
increase the loop size.
2. Cut loop slots in the driveway:
Loop slot should be 1 1/2” to 2” deep.
Loop slot should be 1/4” wide.
Cut diagonal corner slots to protect the wire insulation and keep
the wire from changing directions quickly.
3. Install loop wire:
Recommended Wire: 14 AGW to 18 AGW Stranded XLPE.
Starting at the gate operator, install the loop wire into the lead
and loop slots. Use one continuous run of wire for the loop.
Install the appropriate number of turns as determined by total
loop square footage. (Use attached chart)
Twist lead wires at least 6 turns per foot from the loop to the
loop input. (Hint: Pull the lead wires tight from the corner of the
loop and twist using a power drill.)
Route the lead wires to the edge of the driveway and into rigid
conduit under ground. Seal this joint to protect the wires.
Press the loop wire to the bottom of the loop slot. Use Backer
Rod (foam rubber) to protect and keep the loop wires from
rising when the sealant is poured.
Seal the loop slots with a sealant. Make sure the sealant is
able to sink to the bottom of the loop slot and completely
encase the loop wire. The wire should not move when the
sealant has set.
Lead wires must be
twisted 6 twist/foot
until connected to the
loop input. If
possible, twist lead
wires from the edge
of the loop.
Typical
Loop
Diagonal
Corner Cuts
2”
Typical
}
Loop Wires: 3 Turns
1/4” Saw Slot
Sealant: 3/4” to 1” Min.
Backer Rod
Loop Size
(Sq. Feet)
Number
Of Turns
6’ to 12’
6
13’ to 20’
5
21’ to 60’
4
61’ to 240’
3
241’ & Up
2
Vehicular Gate Only
R
EVERSE
L
OOP
R
EVERSE
L
OOP
O
PEN
L
OOP
4 Feet
4-5 Feet
SHADOW
L
OOP
FSW900 Swing Gate Operator
25
4-5 Feet
4 Feet
